EP 0691553 A2 19960110 - Thin film filters
Title (en)
Thin film filters
Title (de)
Dünnfilmfilter
Title (fr)
Filtres à couches minces
Publication
Application
Priority
US 27182294 A 19940707
Abstract (en)
A thin film filter (10,30), comprising: a transparent substrate (12,56); a substantially transparent dielectric layer (14,54); a precoat layer (18,52); a metal layer (20,50), the metal layer (20,50) being substantially transmissive to visible light; a postcoat layer (22,48); a protective substantially transparent dielectric layer (24,34) comprising silicon nitride; and a low-index, substantially-transparent, dielectric layer (26,32), the low-index layer (26,32) having a lower index of refraction than the protective dielectric layer (24,34). <MATH>
IPC 1-7
IPC 8 full level
G02B 5/28 (2006.01); G02B 1/10 (2015.01); G02B 1/115 (2015.01); G09F 9/00 (2006.01); H01J 29/89 (2006.01)
CPC (source: EP US)
G02B 1/116 (2013.01 - EP US); G02B 1/14 (2015.01 - US); H01J 29/896 (2013.01 - EP US)
Citation (applicant)
- US 5091244 A 19920225 - BIORNARD ERIK J [US]
- EP 0560534 A1 19930915 - BOC GROUP INC [US]
- EP 0632294 A1 19950104 - BOC GROUP INC [US]
- US 5047131 A 19910910 - WOLFE JESSE D [US], et al
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0691553 A2 19960110; EP 0691553 A3 19970312; CA 2150081 A1 19960108; JP H0854507 A 19960227; MY 130594 A 20070731; US 5521765 A 19960528
DOCDB simple family (application)
EP 95304748 A 19950707; CA 2150081 A 19950524; JP 16899695 A 19950704; MY PI9501880 A 19950705; US 27182294 A 19940707